Fishing device for oil wells



April 12, 1938. R. H. GIESEY 1 FISHING DEVICE FOR OIL WELLS Original Filed Feb. 28, 1935 Rum J1. Ciceajqym INVENTOR Apmmg ATTORNEYS.

Patented Apr. 12, 1938 PATENT OFFlCE FISHING DEVICE FOR 01L WELLS Russell H. Giesey, Oklahoma City, Okla, as-

signor to Bess L. Reed, Wichita, Kans.

Application February 28, 1935, Serial No. 8,758

Renewed July-20, 1937 11 Claims. (01. 294-68) "The invention relates to fishing devices for use in oil or other deep wells for removing from the well parts of drilling apparatus or-junk which,

7 may have become detached or broken off or may be otherwise present in the well.

An object of the invention is to provide a fishing device having a large basket or chamber for receiving the parts of drill apparatus or junk of substantial size, while maintaining ample size and strength in the body of the fishing tool to carry the requisite amount of weight to the drilling bit to cut and break the steel junk on the bottom.

Other objects will appear hereinafter.

The invention consists in the features, combination, and arrangement of parts hereinafter described and particularly pointed out in the claims.

In the drawing:

Fig. 1 is a side elevation of the basket tool embodying the invention.

Fig. 2 is a horizontal section on, line 22 of Fig. 1 through the lower part of the body above the beveled bottom of the basket or chamber.

Fig. 3 is a view of the body'of the tool with the sleeve removed, looking from the left of Fig. 1.

Referring to the drawing, I represents the body of the basket tool or device which is a solid casting or forging provided with threads at its ends for connection to the drill stem and drill bit or milling tool, not shown. In the embodiment shown, the upper end of the basket fishing tool body I is provided with an internally threaded bore or'box connection 2 to connect with the drill stem while at its lower end the body I is provided with a threaded pin connection 3' to carry the drill bit or milling tool.

The drill bit or milling tool cuts and breaks up the junk into pieces which pieces are pushed upward off the bottom by the rotating tool and by the flushing fluid, and these pieces fall into the basket of the fishing tool.

The upper party I of thebody l is cylindrical, providing an area tobe engaged by tongs in tightening or unscrewing the body I fromthe drill stem. Below the cylindrical portion 4, the body is offset in respect to the axis of rotation and is substantially semi-circular in cross-section, as shown at 5, and is continued in semicircular shape and offset relation down towards the lower end of the body where" a full'round shape 6 is assumed coa'xial with the axis of rotation and the upper cylindrical part 4, from which round portion 61 the threaded pin connection 3 extends. I

The full round lowerbody portion 6 is slightly greater in radius than the semi-circular intermediate body portion 5, so that an annular shoulder is provided at I. Just at this point also, the inter.- mediate. body portion 5 is made of full round shape of the radius of the major semi-circular portion thereof as shown at 5a,. This holds in position against lateral movement a section of pipe 8, the inside radius of which is the same as the radius of the semi-circular body portion 5 and the full round lower part 5a thereof. The piece of pipe 8 may be cut to any desired length within that of the semi-circular body portion 5, and may be beveled at the top as shown at 9.

This piece of pipe 8 is dropped over the top end I of the tool and fits over the round portions 501, and is thus retained in position in contact with the wall of the semi-circular body portion 5, the lower end of the pipe resting on the annular shoulder I. In this .position the pipe is preferably welded to the body at any convenient point to hold it in position against axial and rotary movement. The weld is indicated at 9a..

The upper and lower cylindrical portions of the tool body are provided with a central bore Ill and a pipe I I is placed in the bore and carries flushing fluid through the tool to the bottom. The central bore I0 takes the form of a groove Illa in the semi-circular body portion 5, and the pipe II occupies the groove. The pipe II is'belled out slightly at its top as shown at Ila. so that it will not drop through the tool, and is preferably welded to the body at its bell portion Ila. The pipe Il may be of any desired inside diameter suitable to give sufficient volume and a nozzle or jet efiect of the flushing stream.

The solidity and strength of the basket tool according to the present invention is readily apparent in the provision of the solid semi-circular body portion 5, which, at the same time, provides a basket chamber of substantial semi-circular shape adapted to readily receive large pieces of junk or parts of drilling apparatus. The intermediate body portion 5 is enlarged near its ends to substantially circular shape in joining the terminal cylindrical portions 4 and 6, the beveled portions: and 5d forming a continuation of the flat face of the body portion 5. A solid tool body I is thus provided of substantial strength from end to end of the tool, amply capable of sustaining any amount of weight required to cut and break up steeljunk inthe bottom of the hole.

It will be readily apparent to those skilled in the art that this arrangement of parts forms a chamber of considerable depth and may be of I any desired depth, and the chamber is substan- In operation, a drill bit or milling tool is screwed into or on the lower end of the body, which has suflicient strength in the solid semi-circular body portion so that any desired amount of weight may be imposed on the drilling bit tocut and break the steel junk on the bottom, usually embedded in mud fluid. The rotation of the drill bit and tool pushes the junk off the bottom and up along the sides of the bore hole, the flushing fluid circulation assisting, and as this junk is moved upward and comes opposite the recessed side of the tool there is a natural tendency of the mass to move inwardly over the mouth of the chamber, and the heavy junk, usually steel, falls by gravity into the chamber.

With this construction no difficult manipulation is required to get the junk into a restricted side opening, as in the case of side-door basket tools, but due to the open semi-circular space extending the full length of the semi-circular body, the junk naturally moves inward into the space in position to drop into the open upper end of the pipe forming the chamber. i The body portion I at its inner faceis flat and is partly surrounded by the shell forming in part the receptacle or basket into which the parts to be recovered enter, the said flat face or side constituting a Wall of this basket-or receptacle. "I'he' receptacle'is therefore defined by the shell portion and by the flat face. Said receptacle is open at its top. a I claim: i I. A fishing tool comprising a body having thread connections at either end, a fluid passage.- way from end to end, the middle'body portion being offset to one side'of the axis of rotation and a shroud about a portion of the oifset and forming a chamber opening upwardly. V

2. A fishing tool includinga body having a mid dle portion positioned eccentric to the axis of rotation, a shoulder formed on the body, a sleeve resting on the shoulder and surrounding, part of the middle portion forming a chamber opening upwardly and a fluid conduit through the tool; '3. A fishing tool for deep wells having an upper terminal portion and alower terminal portion of larger diameter than said upperportion, and axially in line therewith, an intermediate body portion connecting the terminal portions and arranged off'to one side of the axial line of 7 said upper and lower portions, and a basket por- 7 tion carried by the larger diameter lower portion and extending up therefrom with its vertical wall at a greater radial distance irom'the vertical axis of the tool than the side face of the upper terminal portion, said basket portion, being open at its top and surrounding a part of the space between w by the offsetting of the body portion, substantially the upper and lower terminal portions provided as described.

;-4.- A fishing tool having upper and lower terminal portions in axial alignment and a solid bodyportion connecting the-terminal portions andoffset laterally in relationto the vertical axis of the tool; the inner side of said body" portion being substantially fiat 'and substantially in the diametrical plane of the tool, and a basket comprising a shell portion open at its top to the space adjacent the flat sideof the body, and together with the said flat side defining a receptacle for the material to be recovered.

5. A fishing tool comprising a body having terminal portions in axial alignment, an intermediate body portion eccentrically disposed in respect to the axis of said'termin'al portions and providing a'receiving space between said terminal body portions, and a sleeve embracing the eccentric intermediate body portion and being coaxially disposed-with respect to the axis of said terminal portions to enclose a portion of said receiving space. v e

6. A fishing tool comprising a body having terminal portions in axial alignment, an intermediate body portion eccentrically disposed in respect to the. axis of said terminal portions and providing a receiving space between said terminal body portions, an upwardly facing annular shoulder between said intermediate body portion and the Ilower of said terminal portions, and a sleeve resting on said shoulderand embracing the eccentric intermediate body portion, said sleeve being of lessllength than the intermediate body portion and being coaxially disposed with respect to the axis oi'said terminal portions to enclose the lower and having a flat inner face substantially in a plane passing through said axis, and a shellportion opposite to and spaced apart from the said flat face and extending from the lower terminal portion part way of the height of said body portion, and presenting an opening for the :entrance 7 of 'material tob'e recovered into the receptacle defined bythe spaced apart shell and flat face.

8. Afishing-tool comprising a-body having circular terminal portions in'axial alignment and a segmental shaped intermediate, body portion eccentrically disposed'in respect to the axis of said terminal portions and providing a complementary segmental shaped receiving space opposite there to and between said circular terminal'portions, the lower 'end'of said segmental shaped intermediate' body portion being enlarged to circular shape adjoining and coaxialwith butof less diameter than the lower circular terminal portion to provide an upwardly facing shoulder, and a sleeve resting on said shoulder andembracing'the eccentric intermediate body portion and the lower portion of the complementary segmental shaped receiving space to form a' basket or receiving chamber opening Ioutwardlyinto the upper portion of said receiving'spa'ce. e a

9. A fishing tool comprising a body having circular terminal portions in axial alignment and a substantially semi-circular intermediate body complementary substantially semi-circular re; ceiving space opposite thereto and between said circular terminal portions, 'a flushing fiuid conduit extending through a bore in said terminal body portions and disposed in a groove in the' face of said substantially semi-circular body portion,

said'groove forming a continuation of said bore;

and a'sleeve coaxial with said tenninalportions embracing the lower part of said "semi-circular body portion and enclosing the lower part of said semi-circular receiving space to provide a basket or receiving chamber opening upwardly into the upper part of said receiving space.

10. A fishing tool according to claim 9 in which the lower end of said semi-circular intermediate body portion is enlarged to circular shape adjoining and coaxial with but of less diameter than the lower circular terminal portion to provide an upwardly facing shoulder, said sleeve resting 'on said shoulder and embracing said circular enlargement and being retained against lateral movement thereby.

11. A fishing tool according to claim 9 in which the upper and lower ends of said semi-circular intermediate body portion are enlarged to circular shape adjoining the circular terminal portions,

said enlargements including beveled portions substantially forming continuations of the flat face of the semi-circular body portions.

RUSSELL H. GIESEY. 

